UE48-2OS2D2 datasheet(74/92 Pages) SICK

74 / 92 page

S e n S : c o n t r o l - S a f e c o n t r o l S o l u t I o n S | S I c K

8015528/2012-12-17

Subject to change without notice

Safety relays

Evaluation units for safety sensors

7 4

ue48-2oS

Internal circuitry

Function

After applying the supply voltage (LED SUPPLY illuminates), the

normally open contacts remain open. If the connected sensor is

not activated or the protective field of the connected electro-

sensitive protective equipment (ESPE) is not broken (i.e., the in-

put circuits are closed), then the normally open contacts close

immediately in automatic reset; LEDs K1 and K2 illuminate. In

the case of manual resetting, this only occurs after pressing

and releasing the reset button. The activation of the sensor

or incursion into the protective field of the non-contact safety

device (open state of one of the two input circuits) affects the

opening of the normally open contacts (LED K1 and K2 off).

External device monitoring (EDM)

The unit can take over external device monitoring. The contac-

tor monitoring system monitors the external relays by way of

their normally closed contacts.

Manual reset

For manual reset, a pushbutton must be connected to termi-

nals S33 - S34. This reset is monitored.

Automatic reset

For ESPE’s: S33 - S35 must be linked; for applications with

potential free contacts on the input circuit, S12 - S35 must be

linked.

Cross-circuit detection

Cross-circuit is detected on dual-channel wired systems, if

these are wired with opposing polarity.

UE48-2OS2D2 Datasheet(PDF) 74 Page - SICK AG